![]() ![]() The same two pumps in series would pump 150 gpm at 2♸0 = 160 feet of head. Two pumps in series result in an effective pump with twice the head at the same discharge.įor example, two pumps that can individually operate at 150 gpm at a head of 80 feet connected in parallel will have a combined discharge of 2♱50 = 300 gpm at 80 feet. Pumps in SERIES Ep(1) Ep(2)-Ep(exp-series) Ep(1) Table 2. For pumps in parallel, the discharge is multiplied by the number of pumps, and used against the same head value. If the pumps are identical, the system may also be modeled as a single, composite pump that has a characteristic curve equivalent to the two individual pumps. Please visit this link for accessing excel workbook of this manual. The following figure illustrates this concept: The characteristic curves of pumps in series or parallel should be constructed since. Pumps in series (one pump discharges directly into another pump's intake) can be modeled by having the pumps located on the same pipe. The basis for the pump analysis utilized in the spreadsheet is the use of the dimensionless pump parameters defined below: Discharge Coefficient: N D V C Q 3 & (1) Head Coefficient: N D P C H 2 2 (2) Isentropic Efficiency W W actual ideal s & & (3) where N is the pump speed and D is the pump rotor diameter. Parallel pumps can be modeled by inserting a pump on different pipes that have the same From and To Nodes. PUMPS IN SERIES AND PARALLEL PDF TO EXCEL PLUSSeveral pumps in series can even cause disconnections by checking if upstream grades are greater than the downstream grade plus the pump heads. When pumps shut off, it is easier to control one pump. Thanks to the interaction of new pump design, high-efficiency hydraulics and future-proof EC motors, this series of pumps consumes considerably less of that. Note: With pumps in series, it is actually more desirable to use a composite pump than to use multiple pumps in the network. ![]()
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